South Africa lock Johann Muller has been ruled out of their match against Fiji with a hamstring injury.

Muller had been named on the replacements bench for the Pool D clash but was later forced to withdraw. In his absence flanker Francois Louw comes into the squad with fellow reserve Willem Alberts, a back-rower, now covering starting second-rows Danie Rossouw and Bakkies Botha.

Muller's absence is a further blow for the Springboks with Botha continuing to struggle with an Achilles problem and vice-captain Victor Matfield out of the match after he suffered a hamstring injury in the victory over Wales on Sunday.